Marc Châtaigne (Vincent Macaigne), a trainee of the Ministry of the Standard, is entrusted with a delicate mission by the minister’s cabinet director: to go to Guyana to monitor the upgrade of “Guyaneige”, the first indoor ski track in Amazonia. This must boost tourism. On site, he embarks on a visit to site to check that everything is in order. To get there, he is accompanied by Tarzan (Vimala Pons), a pretty trainee at the National Forest Office who serves as a driver. After a road accident, they get lost in the forest. Quickly, the two young people are confronted with many dangers.